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@nitro gisten. atent @fitta JOHN V. vOHAMBERLIN, OF CINCINNATI, ASSIGNOR TOHIMSELF, S. D. PAT- ERSON, AND JOHN V. OHAMBERLIN, O F DELHI, OHIO.

Leners Param: No. 80,332, dared July 28, 186s.

IMPROVEMENT IN LOOK FOIt SEGURIN G RAILROAD-SWITCHES.

To ALL WHOM I'TYMAY ooNoERN:

exact description thereof, which will enable those'skilled in the art to make and use the same. reference being had to the accompanying drawings, forming part of this specication. i This-invention relates to a'new and improved lock for railroad-switches, and it consists` in a'novel construe tion and arrangement of parts, as hereinafter fully shown and described, wherebyithe lock is rendered selflocking, and a very simple and durable lock obtained, all springs and small parts which'areliable to get out of' repair being avoided.' i In the accompanying sheet of drawings`- p i -Figure 1 is a view of my invention applied to the switch-liar of a railroad-switch. Figure 2,' an enlarged and detached internal view of the lock. l Similar letters of reference indicate corresponding parts. A represents switch-stand, and B a 'svvi teh-bar secured to the stand, as usual, by a pivot-bolt, a, and having its lower end' connected to the switch by a rod, shown in red in iig. 1; Y v

The top bar ofthe stand is curved, forming the part of a circle, of 'which .the bolt a of theswitch-bar is the centre, and this top bar has three notches b made in it at equal distances apart, as shown in g. 1.A

C is a lock-case, attached to the'switch-bar B. l

The internal mechanism of this lock iscomposed of three parts only, to wit, a bolt, D, a slide, E, and a cam, F, the latter being operated upon the key, and made and arranged in such it manner that it will raise the bolt, and also serve to hold'the same or prevent it from being raised.

The bolt D, when the lock isin'a locked state, extends down through thebottom of thelock-case A, and into one ofthe notches b, thereby securing the switch-bar, (see Iig. 1.) V. i

The slide E has-an oblong notch, c, made in it, in which notch the end of the cam F works, and the boltD is provided with a laterally-projecting lip, d, which fits in a recess, e, in' the slide lhjsaid slide being suilcien'tly long to ,admit cfa certain degree of play or movement of the slide, independentn the bolt, as shown clearly in both fi uros. i

Inger-der to. raise the bolt and unlock .the lock, the cam F is turned bythe liey in the direction indicated by the arrow I, the cam raising the slide E, and the latter raising the bolt' D out from the notch b, in which it fitted, so that the lower end ofthe bolt may rest' on the top bar ofthe switch-stand, and admit ofthe switch-bar" being moved, and the switch adjusted as desired, the b olt D dropping by its own gravity into a notch, b, that it is brought in line with, and locking the switch-bar, and consequently the switch, the cam F and slide E also dropping in connection with the bolt by virtue of their own gravity, and the A:ingleV of the cam passing over thc top of the bolt, so as to prevent the latter being raised, except by'the turning of the cam through the mediumv of the key.

This portion ofthe parts is shown in red in iig. 2.

Thus, by this simple arrangement, a ve'rydurable and economical switch-lock iszjobtained, all springs and other delicate parts being avoided. i i

I claim as nemend desire to-securc by Letters Patent- I Y l A switch-lock, composed of the bolt D, slide E, and the cam F, all arranged within a suitablecase, A, attached to the switch-har B, substantially as heroin shown and described. i

JOHN v. CHAMBERLIN.

Wi tu esses:

Trios. McLEAN, VINCENT Scnwnnr.. 

